Your natural wools (unbleached/unchemically treated wool) will likely keep their aroma for a longer amount of time. Scent-proof fabrics include polyester and nylon.
According to HowStuffWorks, some common household items are used to remove odor from clothing. They include:
Baking soda — Mix one part baking soda with three parts water and use it as a spray-on cleaner for stains and smells from food or smoke. Be sure to wash your cleaned clothes separately before wearing them again.
Vinegar — Similar to liquid air freshener, vinegar is an effective cleaner for odorous garments. Soak articles in a bowl filled with equal parts white vinegar and water for 24 hours. Then rinse well and dry.
Alumina powder or salt — Alumina powder is available at crafts stores and can be used to get rid of odoriferous substances from leather or fur items. Put about a tablespoon into a bowl with enough warm water to make a paste and then soak the article for several hours or overnight.
These are just some of the many ways you can clean odor off your clothes.
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Merino wool is odor resistant, but if not washed regularly, it will begin to smell. It absorbs the odor, forcing germs to cling to it. Wearing the same merino wool clothing for 3–4 days without washing is possible. The more often it is washed, the less odor it will have.
Merino wool is used in a wide variety of products including rugs, carpets, and padding for furniture. It is also used to make some types of surgical dressings and filters.
The best way to avoid any odor-related problems with merino wool is to wash it properly every time you get around to iting it. If you don't, bacteria will grow on the material and produce gases that cause odors to emerge. Bacteria also cause wool to decompose, which will then release a scent into the air.
Some people may still want to avoid merino wool if it causes allergies or other issues for them. If this is the case for you, there are several other types of wool that can be used instead. These include alpaca, llama, and vicuna wool.
Alpaca and llama fibers are quite similar, while vicuna is very fine indeed. All three are harvested from adult animals and each one has its own characteristics.
To prevent your clothing from collecting aromas after washing, air-dry it outside or use a scent-killing or earth-scented dryer strip in an electric dryer to further reduce human odors. When your hunting garments are completely dry, keep them in an airtight plastic container or scent-trapping bag. The more often you change the collection of clothes, the better.
Scent-trapping bags can be made by taking old T-shirts and cutting out the neck hole then folding the bottom over twice and stapling it closed. You can also buy pre-made scent-trapping bags at any outdoor store. These come in various sizes and usually only cost a few dollars. You just put some animal parts (such as guts) in the bag and seal it up so they don't smell anymore.
People sometimes ask me if they should wash their hunting clothes before going into the woods. Yes, definitely wash them! Animal smells will get on clothes that haven't been washed recently, but especially for big game hunters it's important to wash clothes that have blood stains on them. The more often you hunt, the more clothes you're going to need - so make sure you have enough around the house!
Also, don't wear your hunting clothes into the house after washing them; instead, hang them up to dry. This will help remove any lingering animal smells that may have penetrated the fabric.
Because of the thinness of its strands, silk is another excellent material for breathability. Silk, unlike cotton, does not absorb perspiration or smells. It actually repels water because any liquid that gets on the silk garment will just run off it.
Silk is also durable and long-lasting. It doesn't fade in the sunlight like some other fabrics might, and it won't get ragged like old clothes do. The only thing that can damage silk is soiling - small particles of dirt can become embedded in the fiber, reducing its strength a little. But even then, silk is more resistant to damage than most other fabrics. If you clean your silk item thoroughly, it should last for many years.
So yes, silk is a breathable fabric.